Java Pain Learning Road [II]---jsonobject use

First, Strut2 must introduce the package

To enable a program to run must introduce a json-lib package, the Json-lib package also relies on the following jar packages:

1.commons-lang.jar

2.commons-beanutils.jar

3.commons-collections.jar

4.commons-logging.jar

5.ezmorph.jar

6.json-lib-2.2.2-jdk15.jar

Of course, in addition to these packages, the STRUT2 base package has to be introduced

Struts2-core-2.1.6.jar
Freemarker-2.3.13.jar
Commons-logging-1.0.4.jar
Ognl-2.6.11.jar
Xwork-2.1.2.jar
Commons-fileupload-1.2.1.jar

Note: The package must introduce the full, otherwise the Jsonobject object cannot be created, and there is no exception thrown, the program does not respond.

Second, user class

Create the Com.ljq.action package under the Engineering src directory and place the user class under this package:

third, Jsonaction class

In the Engineering src directory to create com.ljq.action package, put the Jsonaction class under this package, while inheriting the Actionsupport class, the code is as follows:

iv. configuration of Strut2.xml

Strut2.xml placed in the SRC directory, the configuration content is as follows:

Five, index.jsp write, remember to introduce jquery

Six, web.xml configuration

Vii. Other types of usage

import net.sf.json.jsonarray;   import net.sf.json.jsonobject;      public class jsonobjectsample {               //Create Jsonobject Objects        private static JSONObject  Createjsonobject () {           jsonobject jsonobject  = new jsonobject ();           jsonobject.put ( "Name",  "Kevin";           jsonobject.put ("Max.score")  new integer ());           jsonobject.put (" Min.score ",  new integer (m));            Jsonobject.put ("nickname",  "Picglet");           return  jsonObject;       }       public static void main (String[]  args)  {           jsonobject jsonobject =  jsonobjectsample.createjsonobject ();           // Output Jsonobject object            system.out.println ("jsonObject==> "+jsonobject);                   Type of     //interpretation output object            boolean  Isarray = jsonobject.isarray ();           boolean  isempty = jsonobject.isempty ();            Boolean isnullobject = jsonobject.isnullobject ();            systEm.out.println ("IsArray: +isarray+"  isempty: "+isempty+"  isnullobject: "+isnullobject");                      // Add Properties            jsonobject.element ("Address",  "swap  Lake ");           system.out.println (" object ==> after adding attribute "+ Jsonobject);                       //returns a Jsonarray object            jsonarray  jsonarray = new jsonarray ();            Jsonarray.add (0,  "This is a jsonarray value");            jsonarray.add (1, "Another jsonarray value");          &Nbsp; jsonobject.element ("Jsonarray",  jsonarray);            jsonarray array = jsonobject.getjsonarray ("Jsonarray");            system.out.println ("Returns a Jsonarray object:" +array);            //value after adding Jsonarray             //{"name": "Kevin", "Max.score": "," Min.score ":", "nickname": "Picglet", "Address": "Swap lake",            //"Jsonarray": ["this is a jsonarray  Value "," Another jsonarray value "]}            System.out.println (jsonobject);                       //returns a string based on key             string jsonstrIng = jsonobject.getstring ("name");            System.out.println ("jsonstring==>" +jsonstring);       }  }